A family of roe deer grazes on arable farmland in Smailholm near Kelso in the Scottish Borders Photograph: Chris Strickland/Alamy

An underwater photograph shows a nudibranch, a marine gastropod mollusc, on the glove of a freediver off the coast of Batroun in Lebanon Photograph: Ibrahim Chalhoub/AFP/Getty

Snow geese at the Terra Nova bird sanctuary in Richmond, Canada. An estimated 100,000 snow geese have descended upon the Terra Nova bird sanctuary to feed before heading south to warmer destinations, including the US states of Washington and California Photograph: Andrew Soong/Xinhua/Barcroft

The bignose unicornfish can hide its markings while sleeping or when frightened. Teeming with images of spectacular underwater scenes from around the world, Call of the blue is the culmination of a five-year project by photographer and ocean conservationist Philip Hamilton. This groundbreaking book includes contributions from acclaimed scientists and ocean ‘guardians’ Photograph: Philip Hamilton/Call of the Blue/Paul Holberton Publishing

A swimming sea cucumber, Enypniastes eximia, sometimes referred to as the ‘headless chicken monster’, seen during a 2018 Oceano Profundo deep-dive expedition Photograph: NOAA Office of Ocean Exploration and Research/AP

A dead sperm whale is found with more than 5kg of plastic in its stomach, in Kapota Island, Indonesia Photograph: WWF/EPA

Falcon, one of two twin juvenile manatees, is released into the water in Key Largo, Florida. Both manatees were rescued by the Florida Keys-based Dolphin Research Center in October 2016 after their mother was accidentally killed by a boat strike Photograph: Bob Care/AP

A Javan rhino (Rhinoceros sondaicus) – a species seen in the wild only a handful of times – wallows in mud in Indonesia’s Ujung Kulon national park. The Javan rhino is a critically endangered species with a population of just 68 individuals, all confined to the national park in West Java Photograph: Robin Moore/Global Wildlife Conservation

An autumn leaf hangs on a tree in Sehnde near Hanover, Germany Photograph: Julian Stratenschulte/AFP/Getty

A monkey jumps around in Qixing Park, Guilin, Guangxi, China. According to staff, all the monkeys in the park bred from 78 monkeys that came from the zoo more than 10 years ago Photograph: Tang Guangdong/Barcroft

A gentoo penguin at Brown’s Station, Paradise Bay, in the Antarctic. The area forms part of a proposal to create the largest protected area on the planet, an Antarctic Ocean sanctuary. China, Russia, and Norway blocked plans to create a huge new reserve in the Antarctic that would have been a sanctuary for whales and other species Photograph: Paul Hilton/Greenpeace

A black rhino walks through the Nairobi national park in Kenya Photograph: Baz Ratner/Reuters

Leo, an orphaned Sumatran orangutan, is taken to the Sumatran Orangutan Conservation Programme rehabilitation center. Leo will join other orangutans who have been reintroduced to the Pinus Jantho nature reserve. The SOCP has gradually formed a completely new wild population of species that have been threatened with extinction Photograph: Sutanta Aditya/Barcroft

A tree split in two by Hurricane Maria is seen near the Iguaca aviary at El Yunque, Puerto Rico, where the US Fish and Wildlife Service runs a parrot recovery programme. The Puerto Rican parrot requires particular tree structures to establish nesting areas Photograph: Carlos Giusti/AP

Puerto Rican parrots huddle in a flight cage at the Iguaca aviary. Biologists are trying to save the last of these endangered birds after more than half the population disappeared when Hurricane Maria destroyed their habitat and food sources Photograph: Carlos Giusti/AP

A major police investigation has revealed a transnational criminal network breeding, slaughtering and processing tigers in the Czech Republic.The network centers around Vietnamese nationals who can make tens of thousands of euros from each tiger by selling the skin, claws and a jelly boiled down from the flesh and bones. These products, which are valued highly in Asian medicine, are then sold to the Vietnamese population in the Czech Republic and smuggled on to planes bound for Vietnam Photograph: Czech customs authority

A four-week-old emperor penguin chick in Atka Bay, Antarctica. From this age on, parents increasingly encourage their young to leave the pouch and stand on their own two feet Photograph: Stefan Christmann/NHU/BBC

A herd of wild boar alongside traffic in the Forest of Dean. Six animal rights groups have strongly criticized plans by the National Trust to cull wild boar on one of its most renowned estates’ Photograph: Brian McGeough/Alamy